Wei Chu Wu sets fire to his Soho apartment

The madman who allegedly set a deadly blaze at a SoHo apartment building last night after attacking his wife in a domestic dispute — and then fought with a cop and a firefighter trying to save lives in the inferno — was charged with murder and arson today.

Wei Chu Wu, 45, was charged with second-degree murder and first-degree arson. Wu was also rapped for assaulting a cop and resisting arrest.

Wu told investigators that he “was pissed at his wife, thought she was cheating,” a law enforcement source told The Post today.

Wu later “showed no remorse for the fire,” the source said.

Through a translator, Wu told authorities, “I burned down a building,” according to a source.

Wu, 45, allegedly told a roommate, “We’re all gonna die,” after setting ablaze the kitchen of his apartment on the second floor of 41 Spring St., sources said.

The fire, which expanded to five alarms, took 2 1/2 hours to bring under control, killed one unidentified person, whose badly charred body was found on a third-floor fire escape, cops said.